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Updated on: Apr 15, 2010
What Are The Alternatives To Using Global Variables?
It is well known that global variables are generally a bad thing. Although they can seem convenient, they have a number of major drawbacks. This lesson outlines the reasons you may wish to find alternatives to using globals and then shows a number of options in revTalk that allow sharing of da...
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Updated on: Feb 14, 2011
Vision: How do I Edge Detect an Image?
This lesson describes how to detect edges in an image, using three variations of an edge detection mask. Sample code and example screen captures are provided.
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Updated on: Mar 23, 2011
Vision: How do I Threshold an Image?
This lesson describes how to threshold an image. Sample code and example screen captures are provided.